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dc.contributor.authorYan-Xia Jiang
dc.contributor.author姜艳霞
dc.contributor.authorWei-Zheng Weng
dc.contributor.author翁维正
dc.contributor.authorDi Si
dc.contributor.authorShi-Gang Sun
dc.contributor.author孙世刚
dc.date.accessioned2011-11-21T01:28:27Z
dc.date.available2011-11-21T01:28:27Z
dc.date.issued2005-03
dc.identifier.citationJ. Phys. Chem. B, 2005, 109 (16): 7637–7642zh_CN
dc.identifier.issn1520-6106
dc.identifier.urihttp://dx.doi.org/doi:10.1021/jp0480089
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11216
dc.description.abstractPalladium clusters have been synthesized by the "ship-in-a-bottle" approach in the supercages of NaX and NaY faujasite zeolites. In comparison with CO adsorbed on a bulk Pd electrode, the same molecule adsorbed on the Pd clusters electrodes evoked an enhanced IR absorption (EIRA). The enhancement factors have been determined to be about 38 and 51 in NaX and NaY, respectively. IR band centers of linear-bonded CO, bridge-bonded CO, and multi-bonded CO in NaX are measured, respectively, 12, 14, and 11 cm(-1) lower than those of the corresponding adsorption modes in NaY. The adsorption of CO and the oxidation of adsorbed CO in NaX matrix are faster than that in NaY matrix. These results suggest that part of the Pd2+ ions in NaX are located in sites III and III' that are near the 12-ring window of the supercage of zeolite, which lead to the formation of small Pd clusters. The present study is of significant importance in exploring the dependence of catalyst properties on structures, as well as in understanding and predicting the locations and properties of metal clusters in zeolites.zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.titleFTIR studies of zeolite matrix effects on the properties of palladium clusters confined in the supercages of NaX and NaYzh_CN
dc.typeArticlezh_CN


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